OpenAPI Breaking Change Checker

Detect breaking changes between OpenAPI 3.0 and 3.1 specs.

About this tool

Validate API compatibility across versions. Detect breaking changes between OpenAPI 3.0 and 3.1 specs, generate a contract diff and risk report, and produce a PR-ready Markdown summary you can paste straight into review.

What it does

  • Detect breaking changes across OpenAPI 3.0 and 3.1
  • Full contract diff between specs
  • Risk-categorized change report
  • PR-ready Markdown summary
  • Runs entirely in the browser

Repository

chayprabs/openapi-breaking-change-diff-checker

Source code, issues, and releases

Spotted a bug or have an idea?

This tool is built in the open and shaped by feedback. If something feels off — or you want a feature — I read every message.

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